McLaren begins final 2026 upgrade push to address MCL40 handling

McLaren began rolling out its final 2026 Formula 1 upgrade package at the United States Grand Prix in Austin, introducing revised front-suspension geometry and a reprofiled diffuser to address the MCL40’s handling and slow-corner weaknesses. The package is arriving in stages: the next phase is expected in Brazil, with additional parts for Las Vegas dependent on manufacturing timescales.

The MCL40 has not lacked speed everywhere. By mid-season it was among the fastest cars through quick corners, and Lando Norris had won twice. But slow-corner performance, straight-line speed and the car’s nervous behaviour remained problems. At Singapore, Norris said driving it took so much concentration that it was difficult to string qualifying laps together. Ahead of Austin, he said the car was still difficult to drive and that his victories and podiums had come by small margins; after practice, he said McLaren was still “just a step behind”.

McLaren’s aerodynamic rethink began earlier, with a new concept introduced in Azerbaijan that changed the sidepod profile and revised airflow components around the diffuser, floor and rear suspension. After Singapore, team principal Andrea Stella described the Baku work as a foundation rather than a major immediate step. He hoped the full package would return McLaren to the fight for victories.

The components for the late-season push were signed off between the Dutch Grand Prix in late August and the Italian round in early September. Since then, McLaren’s design resources have been focused fully on the 2027 car.

The front-end change addresses a suspension trade-off, not simply a search for more speed. A high degree of anti-squat and anti-dive geometry can stabilise the aerodynamic platform but also dull feedback about changing grip at each axle. Norris’s driving style depends on sensing the front tyres’ lateral grip mid-corner and using it to rotate the car. The implication is that McLaren needs to make its pace easier to access, not merely increase theoretical performance.